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At 37.7 inches of precipitation annually, Seattle ranks 32nd among the nation's 50 largest cities. Notice that most of the cities with more rainfall are located east of the Mississippi River, as shown in the map below...
Analyze Seattle's precipitation patterns and trends from 1978 to present. View monthly and yearly rainfall data, historical precipitation records, and climate change effects on Seattle's weather patterns.
Remarkably, despite being in a region known for its rainfall, the city observes just under nine days of rainfall on average per month, with the highest frequency in November at 9.1 days and the lowest in August at 2.8 days.
On average, Seattle receives over 167 days of precipitation annually. For comparison, here is some data from popular tourist destinations around the world: In Riyadh, Saudi Arabia, there are about 29 precipitation day...
Seattle averages 39.34 inches of precipitation a year, with the vast majority falling as rain instead of snow. Official precipitation totals for the city are measured at Sea-Tac Airport, which is actually located sout...
This page shows the average precipitation (including snowfall) in each month of the year in Seattle, Washington. It is based on NOAA data for the years 1991–2020.
Rain falls throughout the year in Seattle. The month with the most rain in Seattle is November, with an average rainfall of 7.5 inches. The month with the least rain in Seattle is July, with an average rainfall of 0.7 inches.
In an average year, at least 0.01 inches (0.25 mm) of precipitation falls on 150 days, more than nearly all U.S. cities east of the Rocky Mountains. In November, Seattle averages more rainfall than any other U.S. city...
Monthly temperature, precipitation and hours of sunshine. A climate graph showing rainfall, temperatures and normals.
Precipitation amounts to 39.4 inches per year: so, it is at an intermediate level. It ranges from 0.6 inches in the driest month (July) to 6.3 inches in the wettest one (November).
